feat: Namespace.get/set_Pattern ( Fixes #1137 )

Author: James Brundage

Types/Namespace/get_Pattern.ps1

@@ -0,0 +1,33 @@
+<#
+.SYNOPSIS
+    Gets the namespace pattern.
+.DESCRIPTION
+    Gets the pattern of a namespace object.
+#>
+# If we already have a cached .Pattern, return it.
+if ($this.'.Pattern') {
+    return $this.'.Pattern'
+}
+
+# Several types of objects can be used directly as patterns.
+# These patterns can still be overridden by setting the .Pattern property.
+# (in fact, that's also how they are set)
+
+# If we are actually a regex, set the .Pattern property and return. 
+if ($this -is [regex]) {
+    $this.Pattern = "$this"
+}
+
+# If we are a URI, set the .Pattern property to the URI pattern.
+if ($this -is [uri]) {
+    $this.Pattern = [regex]::Escape("$($this.DnsSafeHost)")
+}
+
+if ($this.Name) {
+    $this.Pattern = "^$([Regex]::Escape($this.Name))"
+}
+else {
+    $this.Pattern = [regex]::Escape("$this")
+}
+
+return $this.'.Pattern'

Types/Namespace/set_Pattern.ps1

@@ -0,0 +1,15 @@
+<#
+.SYNOPSIS
+    Sets the namespace pattern.
+.DESCRIPTION
+    Sets the pattern of a namespace object.
+#>
+param($value)
+
+if (-not $Value) { return}
+
+if ($value -isnot [regex]) {
+    $value = [regex]::new($value,'IgnoreCase,IgnorePatternWhitespace','00:00:00.01')
+}
+
+$this.psobject.properties.add([psnoteproperty]::new('.Pattern',$value), $true)